<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
</head>
<body>
    <script>
    //你不知道的JavaScript(上中下)
    function foo() {
      console.log("foo函数：",this)
    }
    
    var message = "Hello World"
    var obj = {
      bar:foo
    }
    obj.bar()
    
    </script>
</body>
</html>